159 research outputs found
The transition out of education and the initial steps into the labour market in the European Union
No full textThe general aim of this research is the study of transitions from education and into the labour market among youths under a simultaneous framework in order to control for the interdependency of such relevant events. An extended version of the human capital model has been applied using the European Community Household Panel. The empirical strategy has aimed at reflecting the independent and simultaneous determination of both labour market and education transitions. Results show that the expected labour market outcomes do not significantly contribute to explain demand for education, other factors being more important. Finally, in the school-to-work transition, demand-side and institutional factors turn to be very important, education attainment effects being blurred by the nature of our sample (students in different points of their programmes).youth labour market ; human capital ; labour supply ; simultaneous decisions
Haslea sigma (Naviculaceae, Bacillariophyta) a newsigmoid benthic species from salt marshes of Southern Brazil
No full textA new sigmoid diatom species Haslea sigma sp. nov. was found alive in sediment composed of clay and silt in salt marshes in Southern Brazil. The species is morphologically distinctive by the following combination of characters: 1) sigmoid valve, 2) thickened virgae forming a pseudostauros, 3) central raphe fissures almost straight and 4) terminal raphe fissures slightly curved. It was analyzed in light and electron microscopy and compared with the sigmoid Haslea nipkowii and with other spindle-shaped Haslea taxa possessing a pseudostauros.Fil: Talgatti, Davia. Universidade Federal do Rio Grande do Sul; BrasilFil: Sar, Eugenia Alicia. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. Division Ficología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Carvalho Torgan, Lezilda. Fundação Zoobotânica do Rio Grande do Sul; Brasi
Exploring the link between employment search time and reservation
No full textIn our piece of work we are facing a two-fold problem: on the one hand, we study the behaviour of young job seekers and the extent to which reservation wages and unemployment benefits play a relevant role in the transition into working life. On the other hand, we intend to find out whether the determinants of the job search process may also affect subsequent wages. We undertake an empirical approach combining one-step estimations with two-step instrumental variables techniques. The data used to this end come from the European Community Household Panel (ECHP) for the period 1995-2001. To be precise, the sub-sample gathers both male and female Southern European (Italian, Greek, Spanish and Portuguese) workers. From the results of the analysis important subtleties arise, particularly related to differences across countries.Transitions into work, unemployment benefits, reservation wages, earnings.
EXPERIMENTAL RESULTS FROM GAMMA-IRRADIATED GAAS CRYSTALS GROWN WITH DIFFERENT TECHNIQUES
No full textJOB MOBILITY AND WAGE GROWTH AT THE BEGINNING OF THE PROFESSIONAL CAREER IN SPAIN
No full textThe beginning of professional careers is often characterised by intensive job mobility, which may influence wage progression. In this study, we aim to measure the immediate impact of different types of job moves on subsequent hourly wages. We use the Spanish section of the European Community Household Panel and work on a sample of young adults. Propensity Score Matching and difference-in-differences are combined to disentangle the impact of long-term and short-term, direct and via unemployment, voluntary and involuntary and one-time and multiple job mobility on subsequent wages during the period 1995-2001. We observe a positive impact of both direct and voluntary moves and a non-scarring effect of involuntary moves, both via unemployment and multiple job moves, but long-term interruptions do have a negative impact on wages.job mobility, wage mobility, propensity score matching
Salvage lymphadenectomy in recurrent ovarian cancer patients: Analysis of clinical outcome and BRCA1/2 gene mutational status
No full textObjective: This study is aimed to analyze the clinical outcome of recurrent ovarian cancer patients bearing isolated lymph-node recurrence (ILNR) who underwent salvage lymphadenectomy (SL). The prognostic role of clinicopathological variables and the mutational status of BRCA1/2 have also been investigated. Methods: This retrospective, single-institutional study included women with platinum-sensitive lymph node recurrence underwent to SL between June 2008 and June 2018. Univariate and multivariate analysis was performed to evaluate the impact of clinical parameters, and BRCA1/2 mutational status on post salvage lymphadenectomy progression-free survival (PSL-PFS). Results: As of June 2019, the median follow-up after SL was 30 months, and the relapse has been documented in 48 (56.5%) patients. In the whole series, the median PSL-PFS was 21 months, and the 3-year PSL-PFS was 36.7%. The median PSL-PFS, according to patients with ILNR (N = 71) versus patients with lymph-nodes and other sites of disease (N = 14), was 27 months versus 12 months, respectively. Univariate analysis of variables conditioning PSL-PFS showed that platinum-free interval (PFI) ≥12 months, normal Ca125 serum levels, and number of metastatic lymph-nodes ≤3 played a statistically significant favorable role. In multivariate analysis, PFI duration ≥12 months and the number of metastatic lymph nodes ≤3 were shown to keep their favorable, independent prognostic value on PSL-PFS. Conclusions: In the context of SL, the patients with long PFI and low metastatic lymph node numbers at ILNR diagnosis have the best outcome. The BRCA mutational status seems not associated with clinical variables and PSL-PFS, differently from other sites of disease in ROC patients
Experimental study of LEC GaAs detectors for X-ray digital radiography
No full textIn previous studies, various semi-insulating LEC GaAs crystals were irradiated with photons in the diagnostic energy range (20-100 keV), in view of a possible application in digital radiography. Solid-state and irradiation measurements, together with Monte Carlo simulations, have indicated good candidates for this application among the crystals we have investigated. In this paper we present results concerning the detection characteristics (detection efficiency, charge-collection efficiency and energy resolution as functions of the bias voltage) of one of these materials and the images obtained by a pixel detector made on the same material and a bump-bonded electronic system. RI Cola, Adriano/G-2379-201
Effect of porosity and active area on the assessment of catalytic activity of non-precious metal electrocatalyst for oxygen reduction
No full textWe describe a method to study porous thin-films deposited onto rotating disc electrodes (RDE) applied to non-platinum group electrocatalyst obtained by pyrolysis of iron phthalocyanine and carbon, FePc/C. The electroactive area and porous properties of the thin film electrodes were obtained using electrochemical impedance spectroscopy under the framework of de Levie impedance model. The electrocatalytic activity of different electrodes was correlated to the total electroactive area (A p) and the penetration ratio parameter through the film under ac current. The cylindrical pore model was extended to the RDE boundary conditions and derived in a Koutecky-Levich type expression that allowed to separate the effect of the electroactive area and structural properties. The resulting specific electrocatalytic activity of FePc/C heat treated at different temperatures was correlated to FePc surface concentration.Fil: Davia, Federico Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Fernández, Cynthia Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Williams, Federico José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Calvo, Ernesto Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentin
Questionnaire for the evaluation of university environmental system
No full textSe presenta el instrumento “Sistemas Ambientales del Profesor en Formación” (SAPF) adaptado para su aplicación específica en el campo de la formación docente. Se describe el proceso desarrollado para su adaptación y las características psicométricas obtenidas (Fiabilidad, Validez y normalización). Recoge información sobre distintos aspectos del sistema ambiental universitario percibido por estudiantes de profesores en formación de la Universidad de Playa Ancha. El instrumento se nutre de dos cuestionarios: “Ambiente Organizacional” (Góngora, 2010) y “Gestión de la Inclusión” (Orrego, 2012). Ambos determinan el ambiente organizacional desde una posición teórica fundamentada en la teoría Ecológica de Bronfenbrenner (1987), la Teoría de Catálisis Fractal (Davia, 2002 y 2006) y la Teoría Catalítica de la Personificación (Carpenter y Davia, 2005). La estructura del instrumento SAPF comprende cuatro partes: Parte I. Antecedentes personales y grupos de pertenencia, Parte II. Organización educativa Universidad de Playa Ancha (UPLA), Parte III. Formación de Profesores en Chile y Parte IV. Formación Profesional Universitaria General en Chile. En el presente estudio se presenta únicamente las características psicométricas de la parte II del Instrumento. La fiabilidad del instrumento SAPF es un Alfa de Cronbach de 0,972. El análisis confirmatorio de la estructura de ocho dimensiones presenta unos índices adecuados. Se han obtenidos baremos generales y por cada una de las dimensiones.This paper describes the unpublished “Environmental Systems Professor in Training” (SAPF) test, its psychometric characteristics (reliability, validity, standardization) and the process for obtaining them. The instrument “Environmental Systems Professor in Training” was adapted for specific application in the field of initial teacher training. This instrument collects information of environmental systems from the perception of teachers in training at the University of Playa Ancha. The adaptation of the instrument was based on previous instruments: Instrument “Organizational Environment” (Góngora, 2010) and the Instrument “Managing Inclusion” (Orrego, 2012). Both instruments determine the organizational environment from a theoretical position based on ecological theory of Bronfenbrenner (1987), Theory of Catalysis Fractal (Davia, 2002 and 2006) and Catalytic Theory of Personification (Carpenter and Davia, 2005). The structure of SAPF instrument comprises four parts: Part I. Personal history and membership group; Part II. Educational organization of Playa Ancha University (UPLA); Part III. Training of teachers in Chile; and Part IV. Professional univerversity general training in Chile. Regarding the psychometric characteristics, reliability SAPF instrument is a Cronbach’s alpha of 0.972. The total variance analysis indicates that four factors explain the variance 0.5214. The analysis determines for each dimension of the instrument unifactorial, or two or three factors structure. Based on this instrument environmental systems teacher training and the perception of “environmental organization UPLA System have been characterized. The differences in perception of teachers in intermediate training and end training on “Environmental System UPLA organization” are not significant
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